{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "efb2ccab",
   "metadata": {},
   "source": [
    "---------------\n",
    "* 记录人：hj\n",
    "* 时间：21-12-09\n",
    "* week15\n",
    "* 参考文档：\n",
    "> 1.[python官方文档](https://python/org)  \n",
    "> 2.[老师的gitee](https://gitee.com/xzhichao/python)  \n",
    "> 3.[老师的博客](https://www.cnblogs.com/xuzhichao)  \n",
    "---------------"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "214620ea",
   "metadata": {},
   "source": [
    "# 上周回顾\n",
    ">1.函数的定义 ： def  \n",
    ">2.函数名的定义规则-->变量名一样的规则  \n",
    ">3.调用函数的方式  \n",
    ">4.参数：    \n",
    ">>1.形式参数（定义函数）  \n",
    ">>2.实际参数（调用函数）  \n",
    ">>3.有多个参数时：  \n",
    ">>>0.关键字参数  \n",
    ">>>a.位置参数（调用函数时）---> 关键字参数要均放在末尾（多个不考虑顺序）  \n",
    ">>>b.默认参数（定义函数时）---> 默认参数均放在末尾（多个不考虑顺序）  \n",
    "\n",
    "# 本周内容\n",
    ">1.函数的返回值  \n",
    ">2.函数的输入参数类型  \n",
    ">3.函数的返回参数类型  \n",
    ">4.模块的概念  \n",
    ">5.如何创建一个模块，并且调用自己定义的模块  "
   ]
  },
  {
   "cell_type": "markdown",
   "id": "589c128e",
   "metadata": {},
   "source": [
    "## 1.函数的返回值\n",
    ">1.返回值关键字：return\n",
    ">>1.函数一定会有返回值（无论是什么编程语言）  \n",
    ">>2.在其他的编程语言中（如c语言，java等），返回值一定要写，不写会报错！；对于python（更      高级的语言），返回值如果不写，给定默认值 None  \n",
    ">>3.返回值一般为函数体运行的结果（result）（函数返回值实践1）;也可以是自定义的函数返回值(实践2)  "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "51a90edf",
   "metadata": {},
   "outputs": [],
   "source": [
    "# 函数返回值实践1：\n",
    "def get_formatted_name(first_name,last_name):#注意是冒号而不是等于号，等于号才是赋值\n",
    "    \"\"\"返回整洁的姓名\"\"\"\n",
    "    full_name = first_name + ' '+ last_name\n",
    "#    print(full_name)\n",
    "    return full_name"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "d8289fbd",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'li hua'"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "get_formatted_name(\"li\",\"hua\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "id": "78e9a5b4",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "li hua\n"
     ]
    }
   ],
   "source": [
    "print(get_formatted_name(\"li\",\"hua\"))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "7dbdfe99",
   "metadata": {},
   "outputs": [],
   "source": [
    "# 函数返回值实践2：\n",
    "def log_in(username,password):\n",
    "    \"\"\"验证登录信息\"\"\"\n",
    "    if username == \"lihua\"and password ==123456:\n",
    "        return 1\n",
    "    else:\n",
    "        return 0"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "id": "031d7b86",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "log_in(\"lihua\",1234567)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "7a77824a",
   "metadata": {},
   "source": [
    "## 2.函数的输入参数类型\n",
    ">1.函数可以输入复杂的参数(例如列表，字典，集合，元组)：  \n",
    ">>1.函数参数为列表  \n",
    ">>2.函数参数为字典  \n",
    "\n",
    ">2.函数可以输入不确定个数的参数：  \n",
    ">>1,*args  \n",
    ">>2.** kwargs  "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "id": "6485db40",
   "metadata": {},
   "outputs": [],
   "source": [
    "def test_A(names):\n",
    "    \"\"\"测试函数参数输入为列表\"\"\"\n",
    "    return names"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "id": "0dbc1912",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['lihua', 'alax', 'hj']"
      ]
     },
     "execution_count": 18,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "test_A([\"lihua\",\"alax\",\"hj\"])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "75684bc8",
   "metadata": {},
   "outputs": [],
   "source": [
    "def test_B(person):\n",
    "    \"\"\"测试函数参数输入为字典\"\"\"\n",
    "    return person"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "id": "31dfa22c",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'stud_id': 20101, 'age': 18, 'job': 'student'}"
      ]
     },
     "execution_count": 20,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "test_B({\"stud_id\":20101,\"age\":18,\"job\":\"student\"})"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "0aa110ed",
   "metadata": {},
   "source": [
    "> 2.函数可以输入不确定个数的参数：  \n",
    ">> 1.*args(星号)  \n",
    ">>> 1.args 可以接受多个数据（单值）  \n",
    ">>> 2.args 将多个数据存在一个**元组**当中，实际还是一个变量  \n",
    "\n",
    ">> 2.** kwargs  \n",
    ">>> 1.kwargs 可以接受多个数据(键值对)==> 关键字参数  \n",
    ">>> 2.kwargs 将多个 键值对 的数据存放在一个 字典 中，实际上还是一个变量  "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 43,
   "id": "aff0d853",
   "metadata": {},
   "outputs": [],
   "source": [
    "def food_ingred(food,*ingreds):\n",
    "    \"\"\"食物配料单\"\"\"\n",
    "    return food,ingreds"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 44,
   "id": "dbd4fb2c",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "('pizza', ('mushroom', 'green peppers', 'extra cheese'))"
      ]
     },
     "execution_count": 44,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "food_ingred(\"pizza\",\"mushroom\",\"green peppers\",\"extra cheese\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 47,
   "id": "4b624bf0",
   "metadata": {},
   "outputs": [],
   "source": [
    "def person(stu_name,**stu_course):\n",
    "    \"\"\"学生个人信息完善表\"\"\"\n",
    "    return stu_name,stu_course"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "dedf5983",
   "metadata": {},
   "source": [
    "## 3.函数的输出（返回值）参数类型\n",
    "> 1.在编程语言中，函数的返回值只能是一个值  \n",
    "> 2.返回值可以是 字符串、数值、列表、字典等数据（单一值）  \n",
    "> 3.python可以输出多个返回值，结果会用一个元组进行封装并返回。（本质不违背函数的定义"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "id": "d0135c34",
   "metadata": {},
   "outputs": [],
   "source": [
    "def test1_return():\n",
    "    \"\"\"测试返回值return为字符串\"\"\"\n",
    "    return \"你好\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "id": "c85344d9",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'你好'"
      ]
     },
     "execution_count": 23,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "test1_return()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "id": "268f0291",
   "metadata": {},
   "outputs": [],
   "source": [
    "def test2_return():\n",
    "    \"\"\"测试返回值return为数值\"\"\"\n",
    "    return 12345"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "id": "b93c4bca",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "12345"
      ]
     },
     "execution_count": 25,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "test2_return()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "id": "5569d98a",
   "metadata": {},
   "outputs": [],
   "source": [
    "def test3_return():\n",
    "    \"\"\"测试返回值return为字典\"\"\"\n",
    "    return {\"stud_id\":20101,\"age\":18,\"job\":\"student\"}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "id": "5e51bf49",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'stud_id': 20101, 'age': 18, 'job': 'student'}"
      ]
     },
     "execution_count": 27,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "test3_return()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 41,
   "id": "4c6b8452",
   "metadata": {},
   "outputs": [],
   "source": [
    "def test4_return():\n",
    "    \"\"\"测试返回值return为列表\"\"\"\n",
    "    return [\"lihua\",\"alax\",\"hj\"]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 42,
   "id": "3e16d3f3",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['lihua', 'alax', 'hj']"
      ]
     },
     "execution_count": 42,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "test4_return()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 37,
   "id": "e209c51b",
   "metadata": {},
   "outputs": [],
   "source": [
    "# ******* return 后面写多个值，将会返回一个元组（一个值，不违背函数在编程思维中的定义）\n",
    "def test5_return():\n",
    "    \"\"\"测试返回值return 为 多个值的情况\"\"\"\n",
    "    return 18,\"lihua\",[\"lihua\",\"alax\",\"hj\"],{\"stud_id\":20101,\"age\":18,\"job\":\"student\"}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 38,
   "id": "95f5360a",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "(18,\n",
       " 'lihua',\n",
       " ['lihua', 'alax', 'hj'],\n",
       " {'stud_id': 20101, 'age': 18, 'job': 'student'})"
      ]
     },
     "execution_count": 38,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "test5_return()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "id": "4740d0eb",
   "metadata": {},
   "outputs": [],
   "source": [
    "def test6_return():\n",
    "    \"\"\"测试返回值return 为 多个值的情况\"\"\"\n",
    "    return 88,89,90,90"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "id": "ae93a68e",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "(88, 89, 90, 90)"
      ]
     },
     "execution_count": 40,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "test6_return()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "c1bcba9c",
   "metadata": {},
   "source": [
    "## 4.模块\n",
    "> 1.使用模块可以隐藏函数的源代码   \n",
    "> 2.使用的人不需要会底层代码（只需要会使用模块即可）\n",
    "\n",
    "> 3.模块的使用方法：\n",
    ">> 1.import模块名  \n",
    ">>> 使用：模块名，函数名（  ）\n",
    "\n",
    ">> 2.from模块名 import函数名  \n",
    ">>> 使用：函数名（）  "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "4da16bb2",
   "metadata": {},
   "outputs": [],
   "source": [
    "import time"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "c4f55e05",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "time.struct_time(tm_year=2021, tm_mon=12, tm_mday=11, tm_hour=14, tm_min=23, tm_sec=44, tm_wday=5, tm_yday=345, tm_isdst=0)"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "time.localtime()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "f40f08ee",
   "metadata": {},
   "outputs": [],
   "source": [
    "from time import localtime"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "373c6e42",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "time.struct_time(tm_year=2021, tm_mon=12, tm_mday=11, tm_hour=14, tm_min=24, tm_sec=22, tm_wday=5, tm_yday=345, tm_isdst=0)"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "localtime()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "7e1cd6ac",
   "metadata": {},
   "outputs": [],
   "source": [
    "import study"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "c637c880",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'a', 'e', 'i', 'o'}"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# 函数的调用\n",
    "study.search4vowels(\"hello zhichao\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "0f856fa5",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on function news_链接 in module study:\n",
      "\n",
      "news_链接(url, 新闻分类, page)\n",
      "    抓取学校新闻的所有页面链接\n",
      "    url:学校网站的域名链接\n",
      "    新闻分类:学校新闻的分类英文简称\n",
      "    page:你想要抓取的页面尾页\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(study.news_链接)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "2e409a36",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['https://www.nfu.edu.cn/xydt/index.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index1.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index2.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index3.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index4.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index5.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index6.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index7.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index8.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index9.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index10.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index11.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index12.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index13.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index14.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index15.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index16.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index17.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index18.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index19.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index20.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index21.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index22.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index23.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index24.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index25.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index26.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index27.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index28.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index29.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index30.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index31.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index32.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index33.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index34.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index35.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index36.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index37.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index38.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index39.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index40.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index41.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index42.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index43.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index44.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index45.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index46.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index47.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index48.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index49.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index50.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index51.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index52.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index53.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index54.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index55.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index56.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index57.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index58.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index59.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index60.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index61.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index62.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index63.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index64.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index65.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index66.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index67.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index68.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index69.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index70.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index71.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index72.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index73.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index74.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index75.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index76.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index77.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index78.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index79.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index80.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index81.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index82.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index83.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index84.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index85.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index86.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index87.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index88.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index89.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index90.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index91.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index92.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index93.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index94.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index95.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index96.htm',\n",
       " 'https://www.nfu.edu.cn/xydt/index97.htm']"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "study.news_链接('https://www.nfu.edu.cn/','xydt','98')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "90b6a20a",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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